If Fiora, Victorious is equipped with Svellsongur (giving her two instances of 'While I'm Mighty, I have Shield'), and she uses a buff while defending, does she stay Mighty due to the Shield keywords, or does she lose both Shield instances because she's evaluated from her base state?

Ruling: Fiora loses both Shield instances and does not stay Mighty. Units are always evaluated from their base state, so without the buff, she does not have Mighty and therefore does not gain the conditional Shield keywords.

Nuances:

• This is a layers/dependency question where conditional abilities don't create self-sustaining loops
• The Shield keywords are dependent on Mighty status, but Mighty status is evaluated from the base unit state first